Abstract

The continuous breakthroughs in computing power of AI chips are pushing their power supply networks to the performance limits. Core voltages have dropped to the 0.8-1.2V range, and single-phase current surges have reached the 100A level. This causes frequent nanosecond-level (10-100ns) transient current gaps at the VRM output, accompanied by MHz-level switching noise interference. Traditional capacitors, due to their high equivalent series resistance (ESR) and large high-frequency impedance, have become a bottleneck restricting system stability, while international high-end solutions pose supply chain security risks. This article will break down the three core performance indicators of the power supply end and use measured benchmark data from Yongming MPS series ultra-low ESR multilayer solid capacitors (conductive polymer chip aluminum electrolytic capacitors) as an example to provide engineers with a highly reliable alternative path that meets international performance standards and has a self-controllable supply chain.

Foreword: The "Invisible Guardian" at the Power Supply End is Being Given a New Mission

In the pursuit of ultimate computing power by AI servers, power integrity (PI) is the core foundation for ensuring stable system operation. Nanosecond-level load jumps in CPUs/GPUs are like sudden "current storms." If the VRM output capacitor cannot quickly replenish energy within the nanosecond window before the control loop response (microsecond level), it will directly cause a core voltage dip, leading to calculation errors or device throttling. Simultaneously, unabsorbed MHz-level switching noise will interfere with high-speed signal transmission. Therefore, the role of the output capacitor has been upgraded from a traditional "basic filtering component" to a "precise protection core," becoming the last crucial channel for energy storage buffering and noise dissipation.

Three Core Indicators: Why Traditional Solutions Fall Short?

1. Nanosecond-Level Transient Support: ESR Becomes the Core Winning Factor

The response speed of a capacitor is directly determined by its internal resistance. An ultra-low ESR value of ≤3mΩ is a rigid requirement to meet the rapid release of nanosecond-level charge and a key guarantee for dealing with transient current gaps.

2. MHz-Level Noise Suppression: High-Frequency Impedance Characteristics are Crucial

Capacitors must maintain extremely low impedance at switching frequencies and their harmonic bands to provide an efficient grounding path for noise, thereby ensuring the integrity of high-speed signal transmission such as PCIe/DDR.

3. High Temperature and Long Lifespan: Adaptable to the Harsh 24/7 Operating Conditions of Data Centers

A 2000-hour lifespan at 105℃, coupled with high ripple current carrying capacity (>10A), is fundamental to coping with long-term high-temperature operation and reducing data center maintenance costs.

Solution Implementation: Yongming MPS Series – A High-Value Domestic Choice Benchmarked Against International Standards

Q&A

Q: How to verify the nanosecond-level transient power replenishment capability of MPS capacitors in a specific project?

A: It is recommended to conduct actual testing on the target test board: simulate the transient current step of the chip (e.g., 100A/100ns) using an electronic load, while simultaneously monitoring the core voltage drop in real time using a high-frequency probe. Comparing the voltage waveform changes before and after replacing the MPS capacitor, the lower voltage sag and faster voltage recovery time provide the most direct performance verification.

Conclusion: In the era of computing power, stability is equally crucial.

Driven by the dual demands of fierce competition in computing power and the need for supply chain self-sufficiency, every component in the power supply chain directly relates to the core competitiveness of the system. Yongming MPS series, with its internationally benchmarked measured performance, rapid response capabilities of the local supply chain, and cost advantages, provides a reliable domestic solution for the power supply end of AI servers, contributing to the steady and sustainable development of China's AI infrastructure.

Summary at the end of the article: Applicable scenarios: VRM output of AI servers/high-performance computing servers CPU/GPU.

Core advantages: Nanosecond-level transient support (ESR≤3mΩ), high-efficiency MHz noise suppression, high-temperature long lifespan (105℃/2000h), high-value domestic replacement.

Recommended Model: Yongming MPS series ultra-low ESR multilayer solid capacitors (conductive polymer chip aluminum electrolytic capacitors) (e.g., MPS471MOED19003R).

【Testing and Data Declaration】
1. Data Source: Data for the Yongming MPS series is from its official product specifications; Panasonic GX series specifications are cited from its publicly released product information. Key performance indicators (such as ESR, ripple current, etc.) have been verified by our laboratory using our own testing equipment on samples purchased through public channels under identical testing conditions. The performance comparisons in this article are based on the above sources and aim to conduct objective technical analysis.

2. Testing Purpose: All tests are conducted under uniform standard conditions to provide engineers with objective and referable technical performance comparison data.

3. Limitations: Test results are only responsible for the performance of the submitted samples under specific test conditions. Different production batches and different testing methods may lead to data differences.

4. Trademarks and Intellectual Property: The terms "Panasonic," "松下," and "GX series" mentioned in this document are trademarks or product series names of their respective owners and are used solely to identify comparable products. The data comparisons in this document do not constitute any endorsement or endorsement of our products by Panasonic, nor are they intended to disparage them.

5. Open Verification: We welcome industry colleagues to conduct technical exchanges and performance verifications based on equivalent standards and conditions.